79 citations · 343 across the 12 of their papers we have counts for
6 papers · 1 filter
Axion superradiance in rotating neutron stars
Francesca V. Day, Jamie I. McDonald
It is a well-known fact that compact gravitating objects admit bound state configurations for massive bosonic fields. In this work we describe a new class of superradiant instabili…
Searching for Axion-Like Particles with X-ray Polarimeters
Francesca Day, Sven Krippendorf
X-ray telescopes are an exceptional tool for searching for new fundamental physics. In particular, X-ray observations have already placed world-leading bounds on the interaction be…
Detecting Fluorescent Dark Matter with X-ray lasers
Francesca Day, Malcolm Fairbairn
Fluorescent Dark Matter has been suggested as a possible explanation of both the 3.5 keV excess in the diffuse emission of the Perseus Cluster and of the deficit at the same energy…
Cosmic axion background propagation in galaxies
Francesca V. Day
Many extensions of the Standard Model include axions or axion-like particles (ALPs). Here we study ALP to photon conversion in the magnetic field of the Milky Way and starburst gal…
Observational consistency and future predictions for a 3.5 keV ALP to photon line
Pedro D. Alvarez, Joseph P. Conlon, Francesca V. Day +2
Motivated by the possibility of explaining the 3.5 keV line through dark matter decaying to axion-like particles that subsequently convert to photons, we study ALP-photon conversio…
3.55 keV photon lines from axion to photon conversion in the Milky Way and M31
Joseph P. Conlon, Francesca V. Day
We further explore a scenario in which the recently observed 3.55 keV photon line arises from dark matter decay to an axion-like particle (ALP) of energy 3.55 keV, which then conve…